Principal Data Scientist I

RELX (LexisNexisLegal); Raleigh (NC); On-site; USD 118,000 - 220,000; Full time

Job summary

RELX (LexisNexisLegal) seeks a Principal Data Scientist I to lead analytic projects, approve models before customer delivery, and shape governance frameworks. You will guide teams and set high standards for model development across advanced AI systems.

The role emphasizes mentoring, stakeholder communication, and managing complex customer relationships, with a focus on responsible AI and data governance in a compliant environment.

Qualifications

• Experience with large language models and prompt engineering.
• Expertise in retrieval augmented generation and semantic search.
• Strong leadership, mentoring and stakeholder communication.

Responsibilities

• Acting as a leader for analytic project and result sharing.
• Leading code reviews and acting as final approver of models before reaching customers.
• Evaluating and creating new frameworks, defining methodologies and governance.
• Managing and leading small-to-medium sized teams, directly or indirectly.
• Setting a high bar for model development.

Skills

LLMs

RAG

Embedding

Semantic search

Knowledge graph

Agentic AI

Evaluation

Cost optimization

Observability

Governance

Communication

Mentoring

Leadership

Project leadership

Customer relationships

Job description

Principal Data Scientist I

Are you looking to develop your Data Scientist career?

Would you like to be part of a team that innovates using technology?

Responsibilities

• Acting as a leader for analytic project and result sharing
• Leading code reviews, acting as a final approver of models before reaching customers
• Evaluating and creating new frameworks and defining methodologies and governance
• Managing and leading small-to-medium sized teams, directly or indirectly
• Setting a high-bar for model development

Requirements

• Large language models (prompting, fine-tuning, adaptation), LLM
• Advanced retrieval-augmented generation (hybrid search, ranking optimization), RAG
• Embedding strategies and semantic search systems
• Knowledge graph integration and graph-enhanced intelligence
• Agentic AI architecture, multi-step reasoning, autonomous agent orchestration, and long-running agent design with feedback loops, GenAI
• Evaluation science (offline metrics, human-in-the-loop systems)
• Cost-performance optimization
• AI observability and monitoring in production
• Data governance and compliance-aware system design
• Have excellent communication skills and the ability to convey information clearly to senior stakeholders
• Be a natural problem-solver and able to take a lead in collaborating to resolve issues
• Have experience in mentoring or training others, and acting as a subject matter expert to guide colleagues
• Have some management experience, including leading a team indirectly or directly
• Have significant experience in a Data Scientist role
• Have experience in leading complex projects and customer relationships

U.S. National Base Pay Range: $118,300 - $219,800. Geographic differentials may apply in some locations to better reflect local market rates.This job is eligible for an annual incentive bonus.

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